blueprint/Codegen: escape blueprint-controlled strings in generated TypeScript

## Summary
blueprint/Codegen.ts generateTypeScript() splices blueprint strings into generated
TypeScript without escaping, so a crafted blueprint can inject statements into the
output that run when a consumer builds or imports the generated file. Only reachable
when codegen runs over an untrusted blueprint (e.g. a third party's plutus.json);
self-authored blueprints are unaffected. generateTypeScript returns a string and
executes nothing itself.

## Affected
packages/evolution/src/blueprint/Codegen.ts
- L907 preamble.title in the header JSDoc (`*/` breaks out)
- L1092-1094 validator.title / hash / compiledCode as raw string literals
- L248, L419, L606, L649 constructor tag in TSchema.Literal / TSchema.TaggedStruct
- L286, L448, L525, L600, L645 field title used as an object property name, unquoted
- L959-963, L1018-1023, L1059-1064, L1087-1090 title/description in JSDoc

entry: blueprint/index.ts exports Codegen.generateTypeScript (public via @evolution-sdk/evolution/blueprint).

## Fix
- string literals (title, hash, compiledCode, tag): emit with JSON.stringify, not "${value}".
- property names (field titles): validate as identifier, else quote with JSON.stringify.
- JSDoc (title, description, header): strip `*/`, or drop untrusted strings from comments.

## Regression test
- given: preamble.title = `x */\nglobalThis.__pwned = 1\n/*`, validator title/hash/compiledCode with `"` and a newline
- before: output contains the injected statement outside any comment/string
- after: every value stays inside its intended comment or literal
Must FAIL on main, PASS after the fix.

## Reference
GHSA-79p9-vmph-w58f

Start in packages/evolution/src/blueprint/Codegen.ts at generateTypeScript(), then review the listed string, property-name, and JSDoc emission sites. Trace the public entry through blueprint/index.ts and create or run the regression coverage using the crafted titles and validator values described in the issue. Done means generated output keeps every supplied value within its intended comment, literal, or property name and the regression test passes.

Vom Indexierungsmodell aus dem Issue-Text verfasst.