dyn_first_order_solver.m: add debugging information

See merge request Dynare/dynare!1965

Bug introduced in 06fd42c1.

Ref. !1964

Ref. !1962

model_diagnostics.m: check for consistent number of equations for Ramsey case before checking for steady state

Implements a Fortran routine `k_order_moment` to compute the k-order unconditional moment of the vector of endogenous variables using simulation

 This commit only introduce new elements in the Dynare language (adding the
 possibility to decompose the target into stationary and non stationary
 components) and insure that all the former codes (ie without decomposition of
 the target) are still working as expected.

The current implementation needs the Jacobian of the full model, which is not
provided by the block-decomposed routines.

Closes: #1823

The routine would not put elements at the right place in the residuals
vector (it would use variable indices instead of equation indices).

Also change the routine so that it computes a residual on evaluated
equations (instead of systematically returning zero for those).

Finally, simplify resid.m by calling this routine instead of embedding a
similar code.

Ref. #1823

Ref. !1961

– Macroprocessor: various fixes for CR+LF encoding
– Macroprocessor: fix line counter inside @{} constructs
– Fix handling of undeclared variables in the planner_objective statement
– With nostrict, really ignore unused endogenous in initval/endval/histval
– No longer consider an equation of the form “x(+1) = 0” as defining x to be a
  constant

(cherry picked from commit 238b66dfe0fd0bcb56becaf1ed96be800d90ba40)

This patch provide a mathematically equivalent approach to update the growth
neutrality correction.

(cherry picked from commit 980a890487cd983eba027bdec63c8a777fd793f7)

Non zero mean exogenous variables in non optimizing part where not accounted for
due to a wrong call to `isfield` function. It is not possible to test
simultaneously the existence of a field and a subfield.

(cherry picked from commit 5a7c0fd2dda6c0ccc554994524bbefb95c29e722)

(cherry picked from commit 405110a9e2e7dbcd41d0aa406986e016aa3a0dff)

Wrong ordering of the reduced form parameters in PAC/MCE auxiliary variable.

(cherry picked from commit e333e851776e4f6afeb9ab1b9536c375e91a4eba)

Closes: #1824

Closes: #1759

[skip ci]

– fix error message when using pac_expectation with occbin_constraints
– various refactorings related to PAC models

Ref. !1959

Ref. !1956

Set to NaN for block

Check will typically crash due to initialization with 0

Ref. !1958

Ref. !1957

Ref. !1955