feat: support fuzzy query for FTS

[BubbleCal]

this introduces fst lib for implementing fuzzy query:

• generally, fst is like an immutable Map<String, u64>, but supports kinds of string queries (e.g. fuzzy search, prefix-match, substring, not equal)
• when building the FTS index, we stores the tokens in a HashMap because we require mutability
• when loading the FTS for serving queries, we load the tokens into fst so that we can support fuzzy query, and probably more kinds of queries in the future

Another impacts:

• fst uses less memory, especially there are many similar tokens
• fst is slower than HashMap for getting the token id, but for FTS most time is spent on searching over posting lists so this doesn't make any visible impacts for query latency

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 77.09924% with 30 lines in your changes missing coverage. Please review.

Project coverage is 78.67%. Comparing base (babb5ab) to head (a956ecb).

Files with missing lines	Patch %	Lines
rust/lance-index/src/scalar/inverted/index.rs	60.60%	23 Missing and 3 partials ⚠️
rust/lance-index/src/scalar.rs	71.42%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3567      +/-   ##
==========================================
+ Coverage   78.65%   78.67%   +0.01%     
==========================================
  Files         258      258              
  Lines       96782    96896     +114     
  Branches    96782    96896     +114     
==========================================
+ Hits        76126    76229     +103     
- Misses      17588    17598      +10     
- Partials     3068     3069       +1     

Flag	Coverage Δ
unittests	78.67% <77.09%> (+0.01%)	⬆️

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[BubbleCal]

move to #3610