Share data between envs

[ofirgall]

Some data can be shared across kv envs. e.g: mason packages (1.4Gb)

ofirg:~/.local/share/kvim-envs/main/mason/packages (19:23:39)
 du -d1 -h .
20M	./cmake-language-server
3.0M	./shfmt
96M	./json-lsp
23M	./yaml-language-server
29M	./vtsls
3.8M	./docker-compose-language-service
42M	./ruff
41M	./prettierd
9.3M	./stylua
13M	./eslint_d
49M	./rust-analyzer
25M	./black
154M	./clangd
239M	./ltex-ls
3.5M	./dockerfile-language-server
4.7M	./vim-language-server
37M	./pyright
77M	./mypy
18M	./bash-language-server
22M	./lua-language-server
22M	./marksman
39M	./gopls
39M	./debugpy
250M	./cucumber-language-server
1.3G	.