CLI: improve trunk install handling of extension not found and version not found

[brianpursley]

Currently, for postgres 15, it panics. From the output, it looks like it is interpreting the error message to be the URL... Downloading from: No extension with the given name was found

Example: Postgres 15, Extension not found

$ trunk install doesnotexist
Using pg_config: /usr/lib/postgresql/15/bin/pg_config
Using pkglibdir: "/var/lib/postgresql/data/tembo/15/lib"
Using sharedir: "/var/lib/postgresql/data/tembo"
Downloading from: No extension with the given name was found
thread 'main' panicked at 'error occurred: relative URL without a base', /usr/local/cargo/registry/src/index.crates.io-6f17d22bba15001f/pg-trunk-0.10.5/src/main.rs:60:6
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Example: Postgres 15, Extension found, but version not found

$ trunk install pgmq --version=1.0.99
Using pg_config: /usr/lib/postgresql/15/bin/pg_config
Using pkglibdir: "/var/lib/postgresql/data/tembo/15/lib"
Using sharedir: "/var/lib/postgresql/data/tembo"
Downloading from: Version not found
thread 'main' panicked at 'error occurred: relative URL without a base', /usr/local/cargo/registry/src/index.crates.io-6f17d22bba15001f/pg-trunk-0.10.5/src/main.rs:60:6
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Postgres 17

The handling seems to be a little better for Postgres 17, but still maybe not ideal.

It correctly says there isn't an extension with that name, but then it prints a message about not being able to install it through the legacy endpoint (?).

Maybe that is the intended output, but as a user, I'm not quite sure what that legacy endpoint error means.

~# trunk install doesnotexist
Using pkglibdir: "/usr/lib/postgresql/17/lib"
Using sharedir: "/usr/share/postgresql/17"
Using Postgres version: 17
Failed to fetch Trunk archive from v1 API: Found no Trunk project with name doesnotexist

error: Cannot install extension for Postgres version 17 through the legacy endpoint

Similar for an extension that is found, but a version that is not found:

~# trunk install pgmq --version=1.0.99
Using pkglibdir: "/usr/lib/postgresql/17/lib"
Using sharedir: "/usr/share/postgresql/17"
Using Postgres version: 17
Failed to fetch Trunk archive from v1 API: Found no Trunk project with name pgmq and version 1.0.99

error: Cannot install extension for Postgres version 17 through the legacy endpoint