chore(main): release 3.1.0

:robot: I have created a release beep boop

added severity filter keymap and improved filtering actions (7842dbb)
only open trouble when results (optionally). Fixes #450 (8fbd2ab)
telescope: allow passing additional trouble options to telescope open/add. Fixes #457 (4eaaf9c)

close section session when needed (2caf73d)
fold: start folding with closest non leaf node. Fixes #420 (f248c69)
follow: improve the way follow works (cf81aac)
format: compat old signs (0e843ed)
format: fallback to sign_defined. Fixes #448 (36545cb)
lsp: batch get offset position for lsp results. See #452 (96c30dc)
lsp: correctly clear location cache (7ea94a6)
lsp: exclude locations that match the current line (8c03e13)
make sure line is always a string passed to get_line_col (5a12185)
preview: correctly load non-scratch buffers (965f56f)
preview: correctly pass options to create scratch buffers. Fixes #451 (c50c7e3)
preview: don't error on invalid positions (6112c3c)
qf: only listen for TextChanged in the main buffer. See #201 (f75992f)
qf: update qflist on TextChanged to update pos. Fixes #201 (c1d9294)
stop (bda8de4)
telescope: remove filter on buf = 0. See #399 (f776ab0)
view: restore loc on first render and dont delete last loc if trouble window was never visisted. See #367 (51bf510)

lsp: cache location requests (6053627)
lsp: optimize batch fetching lsp item locations. Fixes #452 (a6f1af5)
much faster treesitter highlighter (d4de08d)
prevent autocmd leaks (9e3391c)
preview: re-use existing preview when preview is for the same file (a415b64)

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