Improve generic pattern to support "T.*-"

[TIMONz1535]

#3014

Technical changes:

• luadoc Parser now considers . and * as Symbol because I want to parse these tokens after code block, otherwise they just disappeared:

`T`.Name
code symbol name
`T`*
code symbol

• parseCodePattern now checks these symbols .*- and integer as part of the name but only after code block.
• Fixed crash when tokens >= 8 because it was for i = 2, 8 do and finishOffset remained nil.
• Fixed crash with double code "`T``T`" because of content ~= nextContent when 暂时不支持多generic then we call ("%s%s"):format(val) and 2nd argument was expected.
• Fixed wrong getStart start tokens of returned result.
• parseCode was replaced with parseCodePattern because it didn't allow to process the cases "`T`Name" or "`T`*", now they are merged.
• Added simple tests.

[TIMONz1535]

Ohh, I need to figure out how to run the tests 🫠

upd. Yeah I just copied bin from extension then launched test.lua

[sumneko]

nice work, thank you!