Support special characters as key names in dust

Nobody has claimed this yet.

Support a use case "a.b.c" : " You are here"

Note: the json key itself has .

One way to solve is allow {a.b.c} to render the a.b.c. as the key ans not compile the same to getPath

https://github.com/linkedin/dustjs/blob/master/src/dust.pegjs

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key is defined as a character matching a to z, upper or lower case, followed by 0 or more alphanumeric characters
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key "key"
= h:[a-zA-Z_$] t:[0-9a-zA-Z_$-]*
{ return h + t.join('') }

Start with src/dust.pegjs and the existing key grammar. Trace how a dotted key is parsed and resolved, then verify that the proposed {a.b.c} form treats the full text as one key rather than a path; confirm the behavior with the project's existing tests.

Written by the indexing model from the issue text.