[CT-2936] having a folder with the same name as a macro breaks dbt docs

### Describe the bug

The dbt docs site breaks (partially) with the project/database/group staying empty the rest of the site (lineage and documentation) still works.
Looking at the browser console I can see an error like:
```
TypeError: Cannot set properties of undefined (setting 'foo1')
```

### Steps To Reproduce

The bug can be reproduced by having a macro and a folder with the same name such as:
```
macros
├── foo
│   └── foo1.sql (contains foo1 macro)
└── foo.sql (contains foo macro)
```
then running
```
dbt docs generate
dbt docs serve
```
leads to a broken docs site

### Expected behavior

I expect the documentation site to work if the project can be compile and run with dbt

### Screenshots and log output


**The output of `dbt --version`:**
I have try with different version they all seems to have the bug
```
Core:
- installed: 1.4.0
- latest: 1.6.0 - Update available!

Your version of dbt-core is out of date!
You can find instructions for upgrading here:
https://docs.getdbt.com/docs/installation

Plugins:
- sqlite: 1.4.0 - Up to date!
```

### Additional context

I have reproduce the bug while running dbt-docs in dev mode to find the origin of the error.
The issue is in the function `buildProjectTree` in the [file](https://github.com/dbt-labs/dbt-docs/blob/main/src/app/services/project_service.js#L614) `project_service.js`
the catalog.json and manifest.json files used to reproduce the issue can be found here: https://gist.github.com/etnnth/d2039ba410c31debb8ec3a8d844a658b
As far as I understand the error: while building the project tree it get confused because one macro as the same name as a folder and because of that it doesn't add the folder to the project tree.

In the case i rename the macro foo to foot everything works fine and the diff between the working manifest and the broken one is:
```
5,6c5,6
< "generated_at": "2023-08-04T08:18:31.901790Z",
< "invocation_id": "e837a159-6bfb-4c92-98a6-995193871de3",
---
> "generated_at": "2023-08-04T06:49:51.709590Z",
> "invocation_id": "859837c7-a548-4cdc-80ba-26d9fe44a31d",
75c75
< "build_path": null,
---
> "build_path": "target/run/dbt_docs_bug/models/example/my_first_dbt_model.sql",
158c158
< "build_path": null,
---
> "build_path": "target/run/dbt_docs_bug/models/example/my_second_dbt_model.sql",
256,258c256
< "macro.dbt.test_unique",
< "macro.dbt_sqlite.ref",
< "macro.dbt.get_where_subquery"
---
> "macro.dbt.test_unique"
264,268c262
< "compiled_path": "target/compiled/dbt_docs_bug/models/example/schema.yml/unique_my_first_dbt_model_id.sql",
< "compiled": true,
< "compiled_code": "\n \n \n\nselect\n id as unique_field,\n count(*) as n_records\n\nfrom main.\"my_first_dbt_model\"\nwhere id is not null\ngroup by id\nhaving count(*) > 1\n\n\n",
< "extra_ctes_injected": true,
< "extra_ctes": [],
---
> "compiled_path": null,
340,342c334
< "macro.dbt.test_not_null",
< "macro.dbt_sqlite.ref",
< "macro.dbt.get_where_subquery"
---
> "macro.dbt.test_not_null"
348,352c340
< "compiled_path": "target/compiled/dbt_docs_bug/models/example/schema.yml/not_null_my_first_dbt_model_id.sql",
< "compiled": true,
< "compiled_code": "\n \n \n\n\n\nselect id\nfrom main.\"my_first_dbt_model\"\nwhere id is null\n\n\n",
< "extra_ctes_injected": true,
< "extra_ctes": [],
---
> "compiled_path": null,
424,426c412
< "macro.dbt.test_unique",
< "macro.dbt_sqlite.ref",
< "macro.dbt.get_where_subquery"
---
> "macro.dbt.test_unique"
432,436c418
< "compiled_path": "target/compiled/dbt_docs_bug/models/example/schema.yml/unique_my_second_dbt_model_id.sql",
< "compiled": true,
< "compiled_code": "\n \n \n\nselect\n id as unique_field,\n count(*) as n_records\n\nfrom main.\"my_second_dbt_model\"\nwhere id is not null\ngroup by id\nhaving count(*) > 1\n\n\n",
< "extra_ctes_injected": true,
< "extra_ctes": [],
---
> "compiled_path": null,
508,510c490
< "macro.dbt.test_not_null",
< "macro.dbt_sqlite.ref",
< "macro.dbt.get_where_subquery"
---
> "macro.dbt.test_not_null"
516,520c496
< "compiled_path": "target/compiled/dbt_docs_bug/models/example/schema.yml/not_null_my_second_dbt_model_id.sql",
< "compiled": true,
< "compiled_code": "\n \n \n\n\n\nselect id\nfrom main.\"my_second_dbt_model\"\nwhere id is null\n\n\n",
< "extra_ctes_injected": true,
< "extra_ctes": [],
---
> "compiled_path": null,
526a503,524
> "macro.dbt_docs_bug.foo": {
> "name": "foo",
> "resource_type": "macro",
> "package_name": "dbt_docs_bug",
> "path": "macros/foo.sql",
> "original_file_path": "macros/foo.sql",
> "unique_id": "macro.dbt_docs_bug.foo",
> "macro_sql": "{% macro foo() %}\nfoo\n{% endmacro %}",
> "depends_on": {
> "macros": []
> },
> "description": "",
> "meta": {},
> "docs": {
> "show": true,
> "node_color": null
> },
> "patch_path": null,
> "arguments": [],
> "created_at": 1691131760.228975,
> "supported_languages": null
> },
7420,7441d7417
< },
< "macro.dbt_docs_bug.foot": {
< "name": "foot",
< "resource_type": "macro",
< "package_name": "dbt_docs_bug",
< "path": "macros/foo.sql",
< "original_file_path": "macros/foo.sql",
< "unique_id": "macro.dbt_docs_bug.foot",
< "macro_sql": "{% macro foot() %}\nfoo\n{% endmacro %}",
< "depends_on": {
< "macros": []
< },
< "description": "",
< "meta": {},
< "docs": {
< "show": true,
< "node_color": null
< },
< "patch_path": null,
< "arguments": [],
< "created_at": 1691137111.91506,
< "supported_languages": null
```