plugins: Improve error handling on plugin version mismatch (#1838)

* server/tab: Don't panic in `Pane::render`

and do not crash the application on failure to receive a render update
from plugins any longer. Instead, will print a simple string with a hint
to check the application logs, where a more thorough error indication
can be found.

* utils/errors: re-export `anyhow::Error`

to create ad-hoc errors with custom error types, without having to wrap
them into a `context()` before to turn the into anyhow errors.

* plugins: Check plugin version on startup

and terminate execution with a descriptive error message in case the
plugin version is incompatible with the version of zellij being run.

* server/wasm_vm: Add plugin path in version error

so the user knows which plugin to look at in case they're using custom
plugins.

* server/wasm_vm: Check plugin version for equality

Previously we would accept cases where the plugin version was newer than
the zellij version, which doesn't make a lot of sense.

* server/wasm_vm: Prettier error handling

in call to `wasmer::Function::call` in case a plugin version mismatch
can occur.

* tile: Install custom panic handler

that will print the panic message to a plugins stdout and then call a
panic handler on the host that turns it into a real application-level
panic.

* tile: Catch errors in event deserialization

and turn them into proper panics. These errors are symptomatic of an
uncaught plugin version mismatch, for example when developing from main
and compiling zellij/the plugins from source. Normal users should never
get to see this error.

* utils/errors: Improve output in `to_stdout`

for anyhow errors. The default anyhow error formatting of `{:?}` is
already very good, and we just made it worse by trying to invent our own
formatting.

* tile: Reword plugin mismatch error message

* zellij: Apply rustfmt

* changelog: Add PR #1838

Improve error handling on plugin version mismatch.

* server/wasm_vm: Rephrase error in passive voice

1 files changed, 2 insertions, 5 deletions

diff --git a/zellij-utils/src/errors.rs b/zellij-utils/src/errors.rs
index 0f7db131c..7ec02b9a5 100644
--- a/zellij-utils/src/errors.rs
+++ b/zellij-utils/src/errors.rs
@@ -27,6 +27,7 @@ pub mod prelude {
     pub use anyhow::anyhow;
     pub use anyhow::bail;
     pub use anyhow::Context;
+    pub use anyhow::Error as anyError;
     pub use anyhow::Result;
 }
 
@@ -111,11 +112,7 @@ pub trait LoggableError<T>: Sized {
 impl<T> LoggableError<T> for anyhow::Result<T> {
     fn print_error<F: Fn(&str)>(self, fun: F) -> Self {
         if let Err(ref err) = self {
-            let mut msg = format!("ERROR: {}", err);
-            for cause in err.chain().skip(1) {
-                msg = format!("{msg}\nbecause: {cause}");
-            }
-            fun(&msg);
+            fun(&format!("{:?}", err));
         }
         self
     }