Unsupported provider caused panic

[quantonganh]

Given the following config:

[[database]]
Name = 'local/taskwarrior'
Provider = 'sqlite'
DBName = 'taskchampion'
URL = 'file:~/.task/taskchampion.sqlite3?loc=auto'

(The provider should be sqlite3 instead of sqlite)

This caused panic when connecting:

                                                          ║Connecting...panic: runtime error: invalid memory address or nil pointer dereference
                                                          ║                                                        ║                           [signal SIGSEGV: segmentation violation code=0x2 addr=0x18 pc=0x104d08c2c]                ║                                                        ║
                                                          ║┌────────┐ ┌────────┐ ┌────────┐ ┌────────┐ ┌─────────┐ ║
                                          goroutine 33 [running]:w  │ │ Connect│ │  Edit  │ │ Delete │ │  Quit   │ ║
                                                          ║└─────github.com/jorgerojas26/lazysql/components.(*ConnectionSelection).Connect(0x14000010a10, {{0x1400001c2d0, 0x11}, {0x1400000f0b0, 0x6}, {0x1400000f0c0, 0xc}, {0x14000016780, 0x2a}})═════════════════════════════════════════════╝
                                                                        /home/runner/work/lazysql/lazysql/components/ConnectionSelection.go:162 +0x41c
                                                                                                                                                      created by github.com/jorgerojas26/lazysql/components.NewConnectionSelection.func1 in goroutine 1
                                                                                /home/runner/work/lazysql/lazysql/components/ConnectionSelection.go:89 +0x370

[jorgerojas26]

That config schema is outdated, please upgrade to the latest lazysql version and try to add the connection again.

[quantonganh]

Although pressing F1 saves the correct config file, we should still handle unsupported providers to prevent the app from crashing in case someone modifies it manually.

[jorgerojas26]

Your PR does not solve it correctly. The provider can be inferred from the URL string. I'm leaving this issue open because i think this should be resolved and will work on this eventually. If you want to make another PR i'm willing to help.