add from_plxpr conversion function (#837)

**Context:**

This PR ports the [pennylane PR
#5883](PennyLaneAI/pennylane#5883) to catalyst
and renames it `from_plxpr`.

Adding this code to catalyst solves many of the dependency and testing
issues that arise from placing this code in the pennylane resposity. In
the future, if we move more of the catalyst frontend into pennylane,
this function may move there as well.

**Description of the Change:**

Adds a function for converting pennylane variant jaxpr into catalyst
variant jaxpr.

**Benefits:**

Opens up the ability to have improved program capture directly
integrated with catalyst.

**Possible Drawbacks:**

**Related GitHub Issues:**

[sc-61537]

---------

Co-authored-by: David Wierichs <[email protected]>
Co-authored-by: David Ittah <[email protected]>

.dep-versions

@@ -5,4 +5,4 @@ llvm=3a8316216807d64a586b971f51695e23883331f7
 enzyme=v0.0.130
 
 # Always remove custom PL/LQ versions before release.
-pennylane=0.38.0.dev4
+pennylane=0.38.0.dev11

doc/changelog.md

@@ -245,6 +245,10 @@
   [(#931)](https://github.com/PennyLaneAI/catalyst/pull/931)
   [(#995)](https://github.com/PennyLaneAI/catalyst/pull/995)
 
+* Adds `catalyst.from_plxpr.from_plxpr` for converting a PennyLane variant jaxpr into a 
+  Catalyst variant jaxpr.
+  [(#837)](https://github.com/PennyLaneAI/catalyst/pull/837)
+
 <h3>Breaking changes</h3>
 
 * Return values of qjit-compiled functions that were previously `numpy.ndarray` are now of type
@@ -417,6 +421,7 @@ This release contains contributions from (in alphabetical order):
 Alessandro Cosentino,
 Lillian M. A. Frederiksen,
 Josh Izaac,
+Christina Lee,
 Kunwar Maheep Singh,
 Mehrdad Malekmohammadi,
 Romain Moyard,

doc/requirements.txt

@@ -32,4 +32,4 @@ lxml_html_clean
 --extra-index-url https://test.pypi.org/simple/
 pennylane-lightning-kokkos==0.37.0
 pennylane-lightning==0.37.0
-pennylane==0.38.0.dev4
+pennylane==0.38.0.dev11