Improve query syntax and semantics

[mdm-code]

• Tq now expects a pointer to adapter
• Added selector-less string filter expr
• Added support for unquoted bare strings in query
• Implemented literal bare key use in queries
• Lifted new line constraint on queries and strings
• Fixed lexer error with ws allowed
• Adjusted parser error printer to multiline queries
• Change error pointer indent to rely on lineOffset
• Used lexer offset instead of the start in methods
• Pointed to right line in lexer error
• Added interpreter error doc string
• Used validator func. to check if run is line break
• Fixed error query write after offset
• Adjusted parser error to multiline query input
• Aligned lexer tests to multiline query input
• Added bare strings and mulitline input query tests
• Prototyped lexeme escape sequences on the token
• Added escape sequence map to lexer token.
• Split lexeme preparation to string and default
• Removed Trim off the string AST expr
• Allowed bare integers alongside strings
• Allowed for escaped single and double quotes
• Modified in-code docs to use bare multiline strs
• Added token utest for escaped quotes in strings
• Documented changes introducted to Tq in README
• Fixed example test

[codecov]

Codecov Report

Attention: Patch coverage is 70.42254% with 42 lines in your changes missing coverage. Please review.

Project coverage is 86.46%. Comparing base (8bfd479) to head (5951d45).
Report is 27 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/lexer/lexer.go	59.57%	18 Missing and 1 partial ⚠️
internal/parser/parser.go	25.00%	9 Missing ⚠️
internal/lexer/error.go	66.66%	3 Missing and 2 partials ⚠️
internal/parser/error.go	68.75%	3 Missing and 2 partials ⚠️
internal/lexer/token.go	92.10%	2 Missing and 1 partial ⚠️
internal/lexer/validate.go	87.50%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #35      +/-   ##
==========================================
- Coverage   90.35%   86.46%   -3.90%     
==========================================
  Files          12       12              
  Lines         726      820      +94     
==========================================
+ Hits          656      709      +53     
- Misses         51       86      +35     
- Partials       19       25       +6     

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